boofcv.struct.image

Class ImageSingleBand<T extends ImageSingleBand>

java.lang.Object

boofcv.struct.image.ImageBase<T>

boofcv.struct.image.ImageSingleBand<T>

All Implemented Interfaces:

Serializable, Cloneable

Direct Known Subclasses:

ImageFloat, ImageInteger, ImageSInt64

public abstract class ImageSingleBand<T extends ImageSingleBand>
extends ImageBase<T>

A base class for a single band intensity image. The image is an rectangular array where each pixel represents an intensity measurement from an imaging sensor. Internally the pixels are stored a 1D array in a row-major format. Different primitive types (e.g. byte, short, float, double) are implemented by children of this class. This image format is designed to allow quick and easy read/write access to each pixel and automatically supports sub-images.

Most image operations work off of direct children of this class. For operations which support images with multiple bands or colors (e.g. RGB or multi-spectral cameras) there is the ImageInterleaved class and others.

The image is defined by the following parameters:

width

number of columns in the image.

height

number of rows in the image.

startIndex

The index of the first pixel in the data array.

stride

Number of elements which need to be skipped over in the data array between rows.

Sub-images are images that are a rectangular image inside of a larger image. The original image and the sub-image share the same data array, so an operation in one will affect the other. They are useful when only part of the image needs to be processed. All image processing operations support sub-images.

Pixels can be directly accessed by elements. For example, to access the second band in an image with three color bands at pixel (3,10) one would do:
secondBand = img.data[ startIndex + 10*stride + 3 ]

Author:

Peter Abeles

See Also:

Serialized Form

Field Summary

Fields inherited from class boofcv.struct.image.ImageBase

height, startIndex, stride, subImage, width

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	ImageSingleBand()
protected	ImageSingleBand(int width, int height) Creates a new image with all of its parameters initialized, including the data array.

Method Summary

Methods

Modifier and Type	Method and Description
protected abstract Object	_getData() Returns the data array the image is stored in.
protected abstract void	_setData(Object data) Sets the image's internal data array.
abstract ImageDataType	getTypeInfo() Returns image type information
void	reshape(int width, int height) Changes the image's width and height without declaring new memory.
void	setTo(T orig) Sets the values of each pixel equal to the pixels in the specified matrix.
T	subimage(int x0, int y0, int x1, int y1, T subimage) Creates a rectangular sub-image from 'this' image.

Methods inherited from class boofcv.struct.image.ImageBase

_createNew, clone, getHeight, getIndex, getStartIndex, getStride, getWidth, indexToPixel, isInBounds, isSubimage, setHeight, setStartIndex, setStride, setWidth

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ImageSingleBand

protected ImageSingleBand(int width,
               int height)

Creates a new image with all of its parameters initialized, including the data array.

Parameters:

width - Image's width.

height - Image's height.

ImageSingleBand

protected ImageSingleBand()

Method Detail

subimage

public T subimage(int x0,
         int y0,
         int x1,
         int y1,
         T subimage)

Creates a rectangular sub-image from 'this' image. The subimage will share the same internal array that stores each pixel's value. Any changes to pixel values in the original image or the sub-image will affect the other. A sub-image must be a sub-set of the original image and cannot specify a bounds larger than the original. When specifying the sub-image, the top-left corner is inclusive and the bottom right corner exclusive. Thus, a sub-image will contain all the original pixels if the following is used: subimage(0,0,width,height).

Specified by:

subimage in class ImageBase<T extends ImageSingleBand>

Parameters:

x0 - x-coordinate of top-left corner of the sub-image, inclusive.

y0 - y-coordinate of top-left corner of the sub-image, inclusive.

x1 - x-coordinate of bottom-right corner of the sub-image, exclusive.

y1 - y-coordinate of bottom-right corner of the sub-image, exclusive.

subimage - Optional output for sub-image. If not null the subimage will be written into this image.

Returns:

A sub-image of 'this' image.

reshape

public void reshape(int width,
           int height)

Changes the image's width and height without declaring new memory. If the internal array is not large enough to store the new image an IllegalArgumentException is thrown.

Specified by:

reshape in class ImageBase<T extends ImageSingleBand>

Parameters:

width - The new width.

height - The new height.

setTo

public void setTo(T orig)

Sets the values of each pixel equal to the pixels in the specified matrix. Both image's shape must be the same.

Specified by:

setTo in class ImageBase<T extends ImageSingleBand>

Parameters:

orig - The original image whose value is to be copied into this one

_getData

protected abstract Object _getData()

Returns the data array the image is stored in.

Returns:

data array;

getTypeInfo

public abstract ImageDataType getTypeInfo()

Returns image type information

Returns:

The type of image.

_setData

protected abstract void _setData(Object data)

Sets the image's internal data array.

Parameters:

data - data array